Organic Photovoltaics: Benzobisthiazole as Weak Donor for Improved Photovoltaic Performance: Microwave Conductivity Technique Assisted Molecular Engineering (Adv. Funct. Mater. 1/2014)

2014 ◽  
Vol 24 (1) ◽  
pp. 27-27 ◽  
Author(s):  
Masashi Tsuji ◽  
Akinori Saeki ◽  
Yoshiko Koizumi ◽  
Naoto Matsuyama ◽  
Chakkooth Vijayakumar ◽  
...  
Keyword(s):  
Organic Photovoltaics ◽  
Photovoltaic Performance ◽  
Molecular Engineering ◽  
Microwave Conductivity

Benzobisthiazole as Weak Donor for Improved Photovoltaic Performance: Microwave Conductivity Technique Assisted Molecular Engineering

2013 ◽  
Vol 24 (1) ◽  
pp. 28-36 ◽  
Author(s):  
Masashi Tsuji ◽  
Akinori Saeki ◽  
Yoshiko Koizumi ◽  
Naoto Matsuyama ◽  
Chakkooth Vijayakumar ◽  
...  
Keyword(s):  
Photovoltaic Performance ◽  
Molecular Engineering ◽  
Microwave Conductivity

scholarly journals Modulated Photocurrent Spectroscopy Study of the Electronic Transport Properties of Working Organic Photovoltaics: Degradation Analysis

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2660
Author(s):  
Emi Nakatsuka ◽  
Yo Kumoda ◽  
Kiyohito Mori ◽  
Takashi Kobayashi ◽  
Takashi Nagase ◽  
...  
Keyword(s):  
Transport Properties ◽  
Organic Photovoltaics ◽  
Electronic Transport ◽  
Short Circuit ◽  
Photovoltaic Performance ◽  
Acid Methyl Ester ◽  
Short Circuit Current ◽  
Electronic Transport Properties ◽  
Photocurrent Spectroscopy ◽  
Donor And Acceptor

Electronic transport measurement using modulated photocurrent (MPC) spectroscopy is demonstrated herein in working organic photovoltaics (OPVs) before and after AM1.5G irradiation. OPVs with bulk heterojunction (BHJ) using prototypical donor and acceptor materials, poly[[4,8-bis[(2-ethylhexyl)oxy]benzo[1–2-b:4,5-b′]dithiophene-2,6-diyl][3-fluoro-2-[(2-ethylhexyl)carbonyl] = hieno [3–4-b]thiophenediyl]] (PTB7) and [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM), were fabricated. The OPVs had inverted structures (BHJs are formed on transparent conductive oxide substrates). The photovoltaic performance of PTB7:PC71BM OPVs was characterized and the best power conversion efficiency was obtained at PTB7 content of 40 wt%. Electron and hole mobility were determined with MPC spectroscopy in PTB7:PC71BM OPVs and were well balanced at PTB7 content of 40 wt%. Degradation of the photovoltaic performance of PTB7:PC71BM OPVs with PTB7 content of 40 wt% caused by AM1.5G irradiation was studied. MPC spectroscopy showed that the well-balanced mobility was not affected by AM1.5G irradiation. The degradation of OPVs was not due to changes in the electronic transport properties, but mainly to the reduced short circuit current (Jsc) and fill factor (FF). The origin of this reduction is discussed.

scholarly journals Recent Advances in Green-Solvent-Processable Organic Photovoltaics

2021 ◽  
Vol 2 (1) ◽  
pp. 1-28
Author(s):  
Hugo Gaspar ◽  
Gabriel Bernardo ◽  
Adélio Mendes
Keyword(s):  
Organic Photovoltaics ◽  
Large Scale ◽  
Molecular Engineering ◽  
Scale Production ◽  
Green Solvent ◽  
Large Scale Production ◽  
Tremendous Progress ◽  
Halogenated Solvents ◽  
Nanoparticle Ink ◽  
Solvent Processing

Over the last four years, tremendous progress has occurred in the field of organic photovoltaics (OPVs) and the champion power conversion efficiency (PCE) under AM1.5G conditions, as certified by the National Renewable Energy Laboratory (NREL), is currently 18.2%. However, these champion state-of-the-art devices were fabricated at lab-scale using highly toxic halogenated solvents which are harmful to human health and to the environment. The transition of OPVs from the lab to large-scale production and commercialization requires the transition from halogenated-solvent-processing to green-solvent-processing without compromising the device’s performance. This review focuses on the most recent research efforts, performed since the year 2018 onwards, in the development of green-solvent-processable OPVs and discusses the three main strategies that are being pursued to achieve the proposed goal, namely, (i) molecular engineering of novel donors and acceptors, (ii) solvent selection, and (iii) nanoparticle ink technology.

A high-performance non-fullerene electron acceptor with bisalkylthiothiophene π-bridges for organic photovoltaics

2019 ◽  
Vol 7 (46) ◽  
pp. 14499-14503
Author(s):  
Zhaolong Wang ◽  
Kunxiang Huang ◽  
Xianjie Chen ◽  
Yating Xu ◽  
Zheng Xu ◽  
...  
Keyword(s):  
Electron Acceptor ◽  
Organic Photovoltaics ◽  
High Performance ◽  
Photovoltaic Performance

A non-fullerene acceptor IDT2ST-4F bearing a bisalkylthiothiophene unit as the π-bridge was designed and synthesized, and its photovoltaic performance was investigated.

Molecular Engineering of Ruthenium-based Photosensitizers with Superior Photovoltaic Performance in DSSC: Novel N-Alkyl 2-Phenylindole-based Ancillary Ligands

2022 ◽  
Author(s):  
Saba Ashraf ◽  
Rui Su ◽  
Javeed Akhtar ◽  
Ahmed Shuja ◽  
Humaira Masood Siddiqi ◽  
...  
Keyword(s):  
Photovoltaic Performance ◽  
Molecular Engineering ◽  
Ancillary Ligand ◽  
Ancillary Ligands

In this work, we report the design and successful synthesis of two new heteroleptic polypyridyl Ru(II) complexes (SD-5 and SD-6), by incorporating hetero-aromatic electron-donating N-alkyl-2-phenylindole moieties into the ancillary ligand....

Enhancing photovoltaic performance by tuning the domain sizes of a small-molecule acceptor by side-chain-engineered polymer donors

2019 ◽  
Vol 7 (7) ◽  
pp. 3072-3082 ◽  
Author(s):  
Yu-Che Lin ◽  
Yi-Ju Lu ◽  
Cheng-Si Tsao ◽  
Akinori Saeki ◽  
Jia-Xing Li ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Active Layer ◽  
Small Molecule ◽  
Organic Photovoltaics ◽  
Photovoltaic Performance ◽  
Side Chain

This paper reports side-chain-engineered polymer donors and a small-molecule acceptor that are capable of simultaneous charge and energy transfer as the active layer for organic photovoltaics.

Benzothiadiazole building units in solution-processable small molecules for organic photovoltaics

2016 ◽  
Vol 4 (41) ◽  
pp. 15771-15787 ◽  
Author(s):  
Jia Du ◽  
Michael C. Biewer ◽  
Mihaela C. Stefan
Keyword(s):  
Small Molecules ◽  
Electron Acceptor ◽  
Organic Photovoltaics ◽  
Photovoltaic Performance ◽  
Optoelectronic Properties ◽  
Recent Advances ◽  
Solution Processable ◽  
Molecular Semiconductors ◽  
The Relationship

This review attempts to summarize recent advances with respect to solution-processable molecular semiconductors having 2,1,3-benzothiadiazole or its fluorine substituted derivatives as electron-acceptor units published in the last few years. The relationship between the structure, optoelectronic properties, and photovoltaic performance of these molecular semiconductors is discussed.

scholarly journals Molecular Engineering for Large Open-Circuit Voltage and Low Energy Loss in Around 10% Non-fullerene Organic Photovoltaics

2018 ◽  
Vol 3 (4) ◽  
pp. 1028-1035 ◽  
Author(s):  
Bo He ◽  
Bin Yang ◽  
Matthew A. Kolaczkowski ◽  
Christopher A. Anderson ◽  
Liana M. Klivansky ◽  
...  
Keyword(s):  
Energy Loss ◽  
Organic Photovoltaics ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Molecular Engineering ◽  
Low Energy
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